// For flags

CVE-2018-15372

Cisco IOS XE Software MACsec MKA Using EAP-TLS Authentication Bypass Vulnerability

Severity Score

8.1
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A vulnerability in the MACsec Key Agreement (MKA) using Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) functionality of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to bypass authentication and pass traffic through a Layer 3 interface of an affected device. The vulnerability is due to a logic error in the affected software. An attacker could exploit this vulnerability by connecting to and passing traffic through a Layer 3 interface of an affected device, if the interface is configured for MACsec MKA using EAP-TLS and is running in access-session closed mode. A successful exploit could allow the attacker to bypass 802.1x network access controls and gain access to the network.

Una vulnerabilidad en la funcionalidad MACsec Key Agreement (MKA) empleando Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) de Cisco IOS XE Software podría permitir que un atacante adyacente sin autenticar omita la autenticación y pase tráfico a través de una interfaz Layer 3 de un dispositivo afectado. La vulnerabilidad se debe a un error de lógica en el software afectado. Un atacante podría explotar esta vulnerabilidad conectándose y pasando tráfico mediante una interfaz Layer 3 de un dispositivo afectado, si dicha interfaz está configurada para MKA MACsec utilizando EAP-TLS y se está ejecutando en modo "access-session closed". Su explotación con éxito podría permitir que el atacante omita los controles de acceso de red 802.1x y obtenga acceso a la red.

*Credits: N/A
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Adjacent
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-08-17 CVE Reserved
  • 2018-10-05 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-09-17 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-284: Improper Access Control
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cisco
Search vendor "Cisco"
 Ios Xe
Search vendor "Cisco" for product "Ios Xe"
 16.8.1
Search vendor "Cisco" for product "Ios Xe" and version "16.8.1"
-
Affected
Cisco
Search vendor "Cisco"
 Ios Xe
Search vendor "Cisco" for product "Ios Xe"
 16.9.1
Search vendor "Cisco" for product "Ios Xe" and version "16.9.1"
-
Affected